Mobile detection device for space charge distribution in motor bar insulation

Abstract

A mobile detection device for space charge distribution in motor bar insulation comprises mobile pulleys arranged on two sides of a to-be-detected motor bar and a shielding box arranged above the to-be-detected motor bar. A sound wave absorption layer, a PVDF piezoelectric sensor, a grounding electrode and a pressure applying device located above the sound wave absorption layer are sequentially arranged in the shielding box, and the sound wave absorption layer is in close contact with the PVDF piezoelectric sensor which is used for detecting pressure waves reflecting space charge distribution information in a motor bar insulating medium for testing. The high-frequency pulse excitation voltage passes through the coupling capacitor and the periodic voltage excitation and is applied to the wire core of the motor bar to be tested through the protective resistor. According to the invention, the electroacoustic pulse method is used to realize the movable detection of the space charge distribution in the insulating medium under different period electric fields for the bar body, and the device has the advantages of mobility, portability and the like, and provides a good experimental basis for the detection of the destructive effect of the space charge effect in the motor bar insulation on the insulation.

Description

technical field [0001] The invention relates to a technique in the field of motor detection, in particular to a mobile detection device for space charge distribution in motor wire rod insulation. Background technique [0002] Due to the long-term electrical, thermal, mechanical and other stresses on the motor wire rod, the insulation medium of the motor wire rod is aged in advance, which seriously endangers the safe and reliable operation of the motor. Due to the space charge effect, it plays an important role in the deterioration and aging process of the insulation medium of the wire rod. However, the existing space charge effect detection technology for the insulation medium of motor wire rods, on the one hand, is aimed at samples taken from motor wire rods or thin slice samples prepared from the same material, rather than the wire rod itself; on the other hand, The existing space charge detection for the insulation medium of the motor wire rod is fixed at the same positi...

AI Technical Summary

Problems solved by technology

However, the existing space charge effect detection technology for the insulation medium of motor wire rods, on the one hand, is aimed at samples taken from motor wire rods or thin slice samples prepared from the same material, rather than the wire rod body; on the other hand, The existing space charge detection for the insulation medium of the motor wire rod is fixed at the same position for detection, and does not realize movable detection

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